Intaglio-carved Agate Pendant Seal with Crest, 18th/early 19th century, the seal with tapered faceted sides terminating with an oval face carved with a crest depicting a knight mounted on a rearing horse under the motto "vive ut vivas" (live that you may live), with 10kt gold hanger, dia. 1 in.
Note: A note accompanying the seal is inscribed "seals. moss agate L.C. Adams (Mrs. J.Q.A)/carnelian horse/quincey crest./Mrs. J.Q.A." The seal is thought to have been the property of John Quincy Adams's wife Louisa Catherine Johnson Adams (1775-1852).